Use the elimination method to solve the system of equations . Choose the correct ordered pair -3y = x - 5 x + 5y = 7

Respuesta :

Answer:

[tex](2,1)[/tex].

Step-by-step explanation:

We have been given a system of equations. We are asked to solve our given system using elimination method.

[tex]-3y=x-5...(1)[/tex]

[tex]x+5y=7...(2)[/tex]

First of all, we will gather all terms of both equations on left side as shown below:

[tex]-x-3y+5=0...(1)[/tex]

[tex]x+5y-7=0...(2)[/tex]

Adding equation (1) and (2), we will get:

[tex]-x+x-3y+5y+5-7=0\rightarrow 2y-2=0[/tex]

Now, we will add 2 on both sides of our equation as shown below:

[tex]2y-2+2=0+2[/tex]

[tex]2y=2[/tex]

[tex]\frac{2y}{2}=\frac{2}{2}[/tex]

[tex]y=1[/tex]

Upon substituting [tex]y=1[/tex] in equation (2), we will get:

[tex]x+5*1=7[/tex]

[tex]x+5=7[/tex]

[tex]x=7-5[/tex]

[tex]x=2[/tex]

Therefore, the solution for our given system of equations would be [tex](2,1)[/tex].